Preseevative for glue and the like



- Patented S p 1933 'I ;f ;un 'rso STATES PATENT omen rassunvs'rrvs i on GLUE arm was mm v Sherman W. Putnam and NolandPoffen Midlau d,'Mlch., aesignors to TheDow Midland,

160mm, Michigan Ne Drawing.

' The present invention concerned with vege-" table and animal glues and gelatinous materials generally, particularly with the preservation of such materials.

= i In the manufacture of the aforementioned products, the tendency to decompomtion thereof because of growths such as bacteria and molds is well known. Consequently, various preservatives or antiseptics have been proposed for use in inhibiting and controlling bacterial and mold growth therein. Forpreserving glue, mucilage, starch paste, molding and printing jellies, etc., or aqueous solutions thereof, both in preparation and application, formaldehyde and mercuric chloride have The materials thus treated generally tend to, become insoluble) Borax and boric acid, which are milder antiseptics, have been tried, but affect adversely the tests of the glue. Phenol (CeHsOH) has been 3o amount of a phenylphenol, or salt thereof, having the following general formula;

wherein X represents. "a" univalent substituent such as hydrogen, one metal, e. g. copper, or an alkali metal and wherein the oxy-group is in either the ortho or para position.

Our invention, then, is characterized by the features hereinafter fully described and particu larly pointed out in the claims, the following de-. scription setting forth in. detail approved combinations 'of ingredients embodying the invention, such disclosed combinations constituting, however, but several of the various ways in which the principle of our invention may be used.

Our new preservatives, particularly the watersoluble salts of orthoand para-phenylphenoL-are readily soluble in an aqueous solution of practically all of the materials hereinbefore enumerated with which our invention is concerned. 65 These preservatives are also especially advanemi- Mich, a corporation of on February 2, 1931 Applieati Serial No. 513,041

tageous' to use because of their high bactericidal activity, their substantially non-odoriferous character and the relative freedom thereof from coagulating or liquefying action on the glue or other materials treated. Phenol, or the salts thereof such as sodium phenate, etc., in contrast to our preservatives, have lower bactericidal. co-, efficients, impart the undesirable phenolic odor to the product treated therewith and are known to coagulate and otherwise afiect unfavorably the glues or other substance in question with which they are used. i

For example, an aqueous animal glue may be preserved by adding thereto ortho-phenylphenol or the sodium salt thereof in amount equal to from approximately 1 6 to 5 per cent of the dry weight of such glue. We have compared, for instance, animal glue (1) untreated, (2) treated" with ortho-phenylphenol and (3) treated with sodium ortho-phenylphenate. The untreated glue (1) developed mold growth in from 36 hours to 11 days. Samples of the glue treated with 2 per cent of the ortho-phenylphenol (2) and the sodium salt (3) were still entirely free from mold at the end of a month. The herein described preservatives had practically no weakening effect on the tensile strength of glued wooden joints prepared from the treated glues.

When incorporated with starch paste, gelatin or products made therefrom, such as printing Jellies, etc., quantities of our preservative equal to that given in the above example were found sumcient to prevent mold growth. In carrying out these tests varying quantities of preservative 'were employed depending somewhat upon the conditions of temperature and'of moisture, purity, etc., of the material to be preserved. Preferably, a test is made to determine the minimum requirement of preservative needed for a given condition. For instance, to preserve an unpurifled gelatin in a warm atmosphere as much as 3 per cent of the sodium salt may be required, while to preserve starch paste and other adhesives of that type 1 per cent, or less, of the sodium salt was usually found to suffice. We may also incorporate our preservative with inert materials such as starches, etc., and make up the same into capsules, cubes, or other shapes suitable for dispensing.

In brief, our inventionresides in a new composition of matter comprising ail-animal or vegetable glue, paste or similar gelatinous material suitable for adhesives, jellies, etc., which are I approximately 2 susceptible to bacterial and mold growth in the presenceoiairormoistureorboth,orunder other conditions favorable thereto, together with a preservative therefor, such preservative consisting oi. a phenyl phenol or water-soluble salt other modes or applyin the principle os-our invention may be employed as regards theingredients or details herein disclosed, provided those stated by any or the following claims or the equivalent thereof be employed.

We therefore particularly point tinctly' claim as our invention:--

1. Asa'new composition oi matter, a glue containing a (relatively small quantity 0! orthophenylphenol. I

2. As a new composition. of matter, aglue team I taining a relatively small quantity o! a salt of ortho-phenylphenol. W Y a 3. As a new composition or matter, a glue containing a relatively small quantity oi sodium ortho-phenylphenate. 1

4. As a new composition of matter. an animal I glue containing sodium ortho-phenylphenate in amount equal to approximately per cent to 5 per cent oi the dry weight of such phenolic compound having formula wherein 1: represents hydrogen or a metal wherein the oxy-group is in the position 2 or 4 with regard to the diphenyl linkage.

9. The method of preserving glue and gelatinous materials, which comprises incorporating therewith a relatively small quantity of a phenylphenolic compound, having the general formula 0-1: wherein X represents hydrogen or a metal and wherein the oxy-group is in the position 2 or 4 with regard to the diphenyl linkage.

10. The method of preserving glue and gelatinous materials, which comprises incorporating therewith a relatively small quantity of orthophenylphenol. Y Y

11. The method of preserving glue and gelatinous materials, which comprises incorporating therewith a relatively small quantity of a salt of ortho-phenylphenol. I v

12. The method of preserving glue and gelatinous materials, which comprises in'horporating therewith a relatively small quantity of sodium ortho-phenylphenate.

1 SHERMAN W. PUTNAM;

NOLAND POFFENBERGER.

the following general 

